<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <script>
        fetch('http://127.0.0.1:8080/post',{
            method: 'post',
            body: 'uname=李四&age=20',          //body是固定字段，参数需要是在这里
            headers: {
                'Content-Type': 'application/x-www-form-urlencoded'   
            }
        })
        .then(function(res){
            return res.text()
        })
        .then(function(ret) {
            console.log(ret);
        })
    </script>
</body>
</html>